I can’t be sure if you will see an improvement in picture quility right away by moving up to a DSLR. You will however see an improvement as you learn and build your skills.
The D7000 is great for someone who wants a camera that they can grow into. It still has scene modes and automatic features that you can use right away. Then you can slowly start to incorporate advanced features as you master the fundamentals.
In the end the D7000 will allow you to take full control of your photography.
Nikonians is a great resource for anyone shooting a Nikon camera. A membership here gives you access to a large group of experienced and professional photographers who are to help you master the craft of photography.
We are a friendly community of active photographers. We are all here to share our experience and learn from one another.
Dave Summers Lowden, Iowa Nikonians Photo Contest Director
Nikonians membership - "My most important photographic investment, after the camera"